#!/usr/bin/env python3

import os                         # underlying operation system

aa = 10
print()
print(f"main PID:", os.getpid())  # pid of main
print()

newPid = os.fork()                # forking 
myPid = os.getpid()               # pid after forking

aa = aa + 2
print(f"   myPID: {myPid:6d},  newPid: {newPid:6d},                    aa: {aa:6d}")

newNewPid = os.fork()
myPid = os.getpid()

aa = aa + 10
print(f"   myPID: {myPid:6d},  newPid: {newPid:6d}, newNewPid: {newNewPid:6d}, aa: {aa:6d}")